If it’s SHL paper-based (like PwC use for verification at their AC), then yes, it is tougher, but this shouldn’t matter to you. I remember at my AC I only finished 32/40 on the logical test and 17/20 on the numerical, as I ran out of time. I still got through fine. It’s purely for verifying you didn’t cheat on the online tests, and if the tests are tougher, this is also factored in to your assessment. Remember, you’re not being scored objectively like in uni. You’re being scored against a sample of others. You can very well pass the test without having a perfect score (or anything close to a perfect score). Also, presume the tests are negatively marked, so focus on accuracy.